Hydrometer barrel plug



Patented May 10, 1933 2,117,170

UNITED STATES earner cries HYDROMETER BARREL PLUG John Z. Hoyer, Conshohocken, Pa... assignor to Kimble Glass Company, Vincland, N. 5., a corporation of Illinois Application September 18, 1936, Serial No. 101,511

1 Claim. (01. 26545) This invention relates to hydrometers of the tending flange 22 which engages the adjacent type in which the liquid to be tested is drawn into free end of the barrel to form a liquid tight joint. a transparent barrel and retained therein during The body portion of the plug which fits snugly the testing operation. Within the barrel H1 is provided in its outer pe- One of the primary objects of this invention riphery with anv annular groove 24, this groove is to provide a plug for one end of the barrel being preferably spaced from the outer end of through which the liquid to be tested may be the plug about three-quarters of the length of readily drawn into the barrel, the plug, however, the plug. Communicating with the annular being so constructed as to prevent the liquid from groove 24 is a passage 26 which extends inwardly in trickling out of the barrel during the testing oward the center f the pl g and communicates operation. at its inner end with a bore or passage 28 which A further object of the invention is to provide pens through the outer end of the plug. At a a plug of the above mentioned character which point diametrically opposite the passage 26 the will be simple in construction and capable of plug is provided with a second passage 30 which economical production on a commercial scale. is relatively short and which communicates at 1.5

Numerous other objects and advantages of this its one end with the annular groove 24 and at its invention will become more apparent as the folother end with a passage 32 which opens through lowing description proceeds particularly when the inner end of the plug and thus communicates reference is had to the accompanying drawing with the interior of the barrel. wherein A nipple 34 formed of hard rubber or the like Fig. l is an elevational view of a hydrometer preferably securedin the passage 23 and has showing a plug constructed in accordance with Its one d projecting beyond the outer end of the teachings of this invention associated with the plug the suctlon up M bemg Sleeved Over and the Same; secured to the projecting end of thisnipple as Fig. 2 is a fragmentary sectional view of a por-, clearly illustrated m 5 of the drawmg 25 tion of the Structure shown in Fig 1; .1 In using the device, the free end of the suction Fig. 3 is a transverse sectional view taken subup M may be.mserted m Solutlon to be tested stantiauy on the line of Fig 2; and the suction bulb manipulated to draw the Fig 4 is a transverse sectional view taken subsohmon upwardly Into h bar-r 61 It W111 be stantiany on the line of Fig 2; and apparent that the solut1on W111 pass upwardly 30 throu h assa e IS in the suction ti throu h Fig. 5 IS a fragmentary longitudinal sectional boresgzg and into the i. passage view taken substantially on the line 5-5 of Fig.2. formed between the inner wall of the barrel m Referring to the drawing wherein like referand the plug by the annular groove 24' The ence characters designate correspondlng parts uid will flow around this groove and then be throughout all views, the numeral l0 designates drawn into the barrel m by Way of passages 30 35 a barrel which is preferably formed of glass or and 3z some other suitable transparent material and After the desired quantity of t l ti has which is adap to receive the liquid Solution been drawn into the barrel it), the suction tip may 40 to be tested. In accordance with the usual pracbe removed from the solution to be tested and the 40 tioe, the barrel is provided at its one end with a reading taken on the hydrometer float The liquid Suction and eXpelling bulb and at its sages in the plug 25 which place the suction tip th r end with an elongated suction p M which in communication with the interior of the barrel is preferably flexible and which is provided with are so arranged that the barrel does not com- 5 the pas ag through Which liquid y be municate directly with the suction tip, with the drawn o the barrel Disposed in the b e is result that liquid will not trickle from the interior a hydrometer float '3 of y Suitable O- t U of the barrel out through the suction tip during tion. the testing operation. Additionally, it might be The numeral 20 desig a p y which the noted that the passages in the plug are so arsuction tip M is secured to and placed in comranged as to form an air pocket within the plug 50 munication with the interior of the barrel H). which effectively seals the liquid in the hydrom- This plug is formed of some compressible material eter barrel making it necessary to compress the such as rubber or the like whereby it may be bulb 52 to expel the liquid from the barrel after snugly fitted in the open end of the barrel I0 and the testing is completed. the plug is further provided with a laterally ex- While one embodiment of the invention has 5 sage extending from one end of said plug partly through said plug, said plug also having a second passage extending from the other end of said plug partly through the plug and being out of alignment with the first-mentioned passage, said plug being further provided with a peripheral annular groove cooperating with the inner wall of the barrel to form an annular passage and having radial passages connecting said first and second mentioned passages with said annular groove, and

an inlet nipple including a stem portion inserted 10 in said first-mentioned passage.

JOHN Z. HOYER. 

